Modeling the charge-transfer resistance to determine the role of guar and activated polyacrylamide in copper electrodeposition

Fabian, C.P., Ridd, M.J., Sheehan, M.E., and Mandin, Ph. (2009) Modeling the charge-transfer resistance to determine the role of guar and activated polyacrylamide in copper electrodeposition. Journal of the Electrochemical Society, 156 (10). pp. 400-407.

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Abstract

In this paper, we explore the effects of two organic additives (guar and a selectively hydrolyzed polyacrylamide) in the presence of chloride ions on copper electrodeposition using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) at a rotating cylinder electrode (RCE). This paper also demonstrates that the CV and EIS results are consistent and that the selectively hydrolyzed polyacrylamide, "activated polyacrylamide" (APAM), acts as a suppressor/inhibitor at the cathode/ electrolyte interface, whereas guar does not. This paper presents an EIS measurement model for the effect of APAM + Cl- on a copper cathode. The EIS model was applied to data obtained at a potential of -470 mV vs a mercurous-mercuric sulfate reference electrode (MSE) at 45 °C. A comparison between the effect of APAM + Cl- and guar + Cl- was conducted at -490 mV (vs MSE) at 45°C. APAM + Cl- was also investigated at -445 mV (vs MSE) at 65°C. EIS was used to determine the effect of APAM + Cl- or guar + Cl- aging on the charge-transfer resistance using the RCE. CV was used to determine their effect on the polarization of the electrode. The EIS and CV results are consistent.

Item ID: 11236
Item Type: Article (Refereed Research - C1)
Keywords: additives; ageing; charge exchange; electrochemical electrodes; electrochemical impedance spectroscopy; electrodeposition; electrolytes; polarisation; polymers; surface chemistry; voltammetry (chemical analysis)
ISSN: 1945-7111
Date Deposited: 21 May 2010 00:25
FoR Codes: 09 ENGINEERING > 0914 Resources Engineering and Extractive Metallurgy > 091499 Resources Engineering and Extractive Metallurgy not elsewhere classified @ 50%
03 CHEMICAL SCIENCES > 0301 Analytical Chemistry > 030102 Electroanalytical Chemistry @ 50%
SEO Codes: 86 MANUFACTURING > 8698 Environmentally Sustainable Manufacturing > 869899 Environmentally Sustainable Manufacturing not elsewhere classified @ 50%
84 MINERAL RESOURCES (excl. Energy Resources) > 8498 Environmentally Sustainable Mineral Resource Activities > 849899 Environmentally Sustainable Mineral Resource Activities not elsewhere classified @ 50%
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